FIGURE 1. A hierarchical network with structure on many scales, and the corresponding hierarchical random graph.
From the following article:
Hierarchical structure and the prediction of missing links in networks
Aaron Clauset, Cristopher Moore & M. E. J. Newman
Nature 453, 98-101(1 May 2008)
doi:10.1038/nature06830
Each internal node r of the dendrogram is associated with a probability pr that a pair of vertices in the left and right subtrees of that node are connected. (The shades of the internal nodes in the figure represent the probabilities.)
